I cannot reproduce on my fedora 20 x86_64 box.

Can you post a backtrace?

And, what happens if you try kde-open without --noninteractive option with a https url?

(In reply to comment #2)
> And, what happens if you try kde-open without --noninteractive option with a
> https url?

Without the --noninteractive parameter, the command succeeds (see https://gist.github.com/joschi/e2463cea4fa81af7787e#file-gistfile1-txt-L16 in lines 16-18).

Created attachment 87170 [details]
"kde-open --noninteractive [...]" backtrace

Backtrace of "kde-open --noninteractive [...]" as requested.

It would appear you're missing necessary debug symbols for the backtrace to be usable (ie, the backtrace is missing line numbers).

Happens, have no better backtrace, but the call chain is deterministic anyway.

kde-open calls 
>>  return app.kde_open(args->url(0), QByteArray(), false);

kde_open will thus call
>>  KRun * run = new KRun( url, 0 );
>>  run->setRunExecutables(allowExec);
>>  this-exec();

the two unnamed symbols must be
>> runTempService()
>> runCommandInternal()

for the latter is what triggers
>> KStartupInfo::sendStartup(id, data);

what should not happen, since the --noninteractive mode doesn't open an X server connection, but KStartupInfo::sendStartup() creates "KXMessages msgs;" which requires a QWidget as helper to send the message (or alternatively X11 anyway)

I assume "asn" should be '"0"' (a char* containing "0") to prevent the startup notification (bouncannoyance) but is QByteArray() as default parameter, so 

kde-open -> kde_open should likely generate

>>  KRun * run = new KRun( url, 0, 0, false, false, "0" );

for at least the --noninteractive case.

Didn't test, though.

with more testing, I can reproduce the crash now.  I'd switched default browser to chrome before.

Using the kde default (konqueror), I can now exhibit the crash (with a better backtrace shortly)

#0  0xb7fff424 in __kernel_vsyscall ()
#1  0x429f4b96 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#2  0x429f63d3 in __GI_abort () at abort.c:89
#3  0x454517da in qt_message_output (msgType=QtFatalMsg, buf=0x8123590 "QWidget: Cannot create a QWidget when no GUI is being used") at global/qglobal.cpp:2359
#4  0x454519aa in qt_message(enum QtMsgType, const char *, va_list) (msgType=msgType@entry=QtFatalMsg, msg=msg@entry=0x4d507cd0 "QWidget: Cannot create a QWidget when no GUI is being used", ap=ap@entry=0xbfffe604 "`\021\022\b\017\267EE`unE")
    at global/qglobal.cpp:2405
#5  0x45451f69 in qFatal (msg=msg@entry=0x4d507cd0 "QWidget: Cannot create a QWidget when no GUI is being used") at global/qglobal.cpp:2588
#6  0x4ce07616 in QWidgetPrivate::init (this=0x811a9f8, parentWidget=parentWidget@entry=0x0, f=...) at kernel/qwidget.cpp:1284
#7  0x4ce078a4 in QWidget::QWidget (this=0x811f990, parent=0x0, f=...) at kernel/qwidget.cpp:1175
#8  0x47e34ae5 in ProgressWidget (parent=<optimized out>, object=0x8111088, job=0x80f5b30, this=0x811f990) at /usr/src/debug/kdelibs-4.13.1/kdeui/jobs/kwidgetjobtracker_p.h:83
#9  KWidgetJobTracker::registerJob (this=0x8111088, job=0x80f5b30) at /usr/src/debug/kdelibs-4.13.1/kdeui/jobs/kwidgetjobtracker.cpp:81
#10 0x4ae7fbc0 in KDynamicJobTracker::registerJob (this=0x810f4c8, job=0x80f5b30) at /usr/src/debug/kdelibs-4.13.1/kio/kio/kdynamicjobtracker.cpp:88
#11 0x4ae479f4 in newJob (flags=..., _staticData=..., packedArgs=..., command=67, url=...) at /usr/src/debug/kdelibs-4.13.1/kio/kio/job_p.h:325
#12 KIO::get (url=..., reload=reload@entry=KIO::NoReload, flags=...) at /usr/src/debug/kdelibs-4.13.1/kio/kio/job.cpp:1374
#13 0x4aeb44c9 in KRun::scanFile (this=0x80cf458) at /usr/src/debug/kdelibs-4.13.1/kio/kio/krun.cpp:1312
#14 0x4aebca50 in KRun::init (this=0x80cf458) at /usr/src/debug/kdelibs-4.13.1/kio/kio/krun.cpp:1233
#15 0x4aeb32d4 in KRun::slotTimeout (this=0x80cf458) at /usr/src/debug/kdelibs-4.13.1/kio/kio/krun.cpp:1329
#16 0x4aeb3dd0 in KRun::qt_static_metacall (_o=0x0, _id=6, _a=0xbfffeae4, _c=<optimized out>) at /usr/src/debug/kdelibs-4.13.1/i686-redhat-linux-gnu/kio/krun.moc:62
#17 0x45590395 in QMetaObject::activate (sender=sender@entry=0x80cf108, m=m@entry=0x456e6a18 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3567
#18 0x455e4246 in QTimer::timeout (this=this@entry=0x80cf108) at .moc/release-shared/moc_qtimer.cpp:147
#19 0x4559a326 in QTimer::timerEvent (this=0x80cf108, e=0xbfffee6c) at kernel/qtimer.cpp:280
#20 0x45594ae4 in QObject::event (this=0x80cf108, e=0xbfffee6c) at kernel/qobject.cpp:1184
#21 0x4cda7bd4 in QApplicationPrivate::notify_helper (this=0x80913c0, receiver=0x80cf108, e=0xbfffee6c) at kernel/qapplication.cpp:4565
#22 0x4cdaeb29 in QApplication::notify (this=0xbffff154, receiver=0x80cf108, e=0xbfffee6c) at kernel/qapplication.cpp:4351
#23 0x4557a5f6 in QCoreApplication::notifyInternal (this=0xbffff154, receiver=0x80cf108, event=event@entry=0xbfffee6c) at kernel/qcoreapplication.cpp:953
#24 0x455af2db in sendEvent (event=0xbfffee6c, receiver=<optimized out>) at kernel/qcoreapplication.h:231
#25 QTimerInfoList::activateTimers (this=this@entry=0x808cdac) at kernel/qeventdispatcher_unix.cpp:621
#26 0x455abfc9 in timerSourceDispatch (source=source@entry=0x808cd78) at kernel/qeventdispatcher_glib.cpp:193
#27 0x42f97556 in g_main_dispatch (context=0x8090658) at gmain.c:3066
#28 g_main_context_dispatch (context=context@entry=0x8090658) at gmain.c:3642
#29 0x42f97920 in g_main_context_iterate (context=context@entry=0x8090658, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3713
#30 0x42f979e9 in g_main_context_iteration (context=0x8090658, may_block=1) at gmain.c:3774
#31 0x455ac1c4 in QEventDispatcherGlib::processEvents (this=0x806fe60, flags=...) at kernel/qeventdispatcher_glib.cpp:450
#32 0x45578ea0 in QEventLoop::processEvents (this=this@entry=0xbffff064, flags=...) at kernel/qeventloop.cpp:149
#33 0x45579231 in QEventLoop::exec (this=this@entry=0xbffff064, flags=...) at kernel/qeventloop.cpp:204
#34 0x4557f06b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#35 0x4cda5ee5 in QApplication::exec () at kernel/qapplication.cpp:3823
#36 0x0804b40a in ClientApp::kde_open (this=this@entry=0xbffff154, url=..., mimeType=..., allowExec=allowExec@entry=false) at /usr/src/debug/kde-runtime-4.13.1/kioclient/kioclient.cpp:182
#37 0x0804b94f in ClientApp::doIt () at /usr/src/debug/kde-runtime-4.13.1/kioclient/kioclient.cpp:298
#38 0x0804a835 in main (argc=3, argv=0xbffff2a4) at /usr/src/debug/kde-runtime-4.13.1/kioclient/kioclient.cpp:145

That's a different backtrace, triggered by a different branch of KRun::init(), ie. KRun has multiple GUI dependencies.

Hm, xdg-open script from openSUSE 13.1 does not use that flag, so it probably has been added recently. As a workaround, I suggest to remove it again.

Yup,
http://cgit.freedesktop.org/xdg/xdg-utils/commit/?id=8369f878c08b435ecd5523b4c49eff36348c4bae

I also get this crash when trying to open an html page.

$ xdg-mime query filetype foo.html
text/html
$ xdg-open foo.html
unnamed app(15780) ClientApp::doIt: Creating ClientApp
kioclient(15780) ClientApp::kde_open: KUrl("file:///path/to/foo.html")
kioclient(15780)/kdecore (KSycoca) KSycocaPrivate::openDatabase: Trying to open ksycoca from "/var/tmp/kdecache-username/ksycoca4"
QWidget: Cannot create a QWidget when no GUI is being used
/usr/bin/xdg-open: line 513: 15780 Aborted                 kde-open --noninteractive "$1"

Thank you for the crash reports.

As it has been a while since this was reported, can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved.

I have set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved/worksforme" when you respond, thank you.

Does kde-open even exist still? Anyway, I tested my command [above](https://bugs.kde.org/show_bug.cgi?id=336117#c12) and xdg-open works fine with html pages.

I cannot reproduce this anymore. Looks fine to close.

Two users have confirmed working, setting to resolved. If any other users are still experiencing the issue please reopen.